Orthophoto in the South of 2014

Orthophoto has the same geometric properties as a map and can be linked to a reference system. Orthophotos are divided into different orthophoto standards suitable for different purposes. Photo by Ortho: Round-trip photography covering the whole country. Ground resolution of these varies between 0.50, 0.40 or 0.25 m. From 2012, ground resolution applies 0.25 m for orthophoto from orbital photography. Accuracy ± 2 m for Ortophoto 50 (depends on the quality of the used height model)正射影像（Orthophoto）具有与地图一致的几何属性，可与参考坐标系关联。正射影像分为适用于不同应用场景的各类标准。 正射影像采集说明： 采用覆盖全国的往返摄影作业； 此类正射影像的地面分辨率为0.50米、0.40米或0.25米；自2012年起，轨道摄影生成的正射影像地面分辨率统一为0.25米。 50型正射影像的精度为±2米，其精度取决于所使用的高程模型质量。